In general, some elements are presented about the theater whose cathartic purpose is understood from the beginning through the experience it provides to the public as an empathic relationship and identification between the spectator-actor-character is being produced. Then there are some aspects of acting as a phenomenon, addressing the theme to the process of creation inherent to the actor's art, whose procedure has been the subject of interest of authors from various disciplines, allowing to elucidate some of the psychological processes involved, being of importance for psychology, theatrical pedagogy and recently for neuroscience. Therefore, a brief description is made about the creativity and the basic and superior psychological processes expressed during the preparation of the actor to create the character and achieve its dramatization. Therefore, it was found that this process necessarily begins with awareness, emphasizing the basic cognitive processes to expand its perceptual and attentional disposition, a moment of exploration that allows it to discover other ways of perceiving about itself and the external world, recognizing these cognitive processes from the corporal expression and exercising the abilities that will allow him to arrive at a second nature, provoking a physical and mental predisposition to achieve the spontaneous and artistic expression, also the higher psychological processes are implied that can be exercised during the improvisation, the which in turn arouses action and therefore theatrical creation.